<template>
  <div>
    <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
       
         <!-- 卡片区域 -->
         <el-card>
             <!-- 提示区域 -->
             <el-alert
                title="添加商品信息"
                type="info"
                show-icon center closable>
            </el-alert>
              <!-- 步骤条区域 -->
              <el-steps :space="200" :active="activeNum" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
             </el-steps>
             <!-- tabs栏 -->
             <el-form :model="addForm" :rules="addFormRules" ref="addFormRef"  label-position="top">  
              <el-tabs :before-leave="beforeTabLeave" :tab-position="'left'" v-model="activeName" @tab-click="handleClick()">
                <el-tab-pane label="基本信息" name="0">
                  <el-form-item label="商品名称" prop="goods_name"> <el-input v-model="addForm.goods_name"></el-input></el-form-item>      
                  <el-form-item label="商品价格" prop="goods_price"><el-input v-model="addForm.goods_price" type="number"></el-input></el-form-item>
                  <el-form-item label="商品重量" prop="goods_weight"><el-input v-model="addForm.goods_weight" type="number"></el-input> </el-form-item>
                  <el-form-item label="商品数量" prop="goods_number"><el-input v-model="addForm.goods_number" type="number"></el-input> </el-form-item>
                  <el-form-item label="商品分类" prop="goods_cat">
                    <el-cascader
                      v-model="addForm.goods_cat"
                      :options="cateList"
                      :props="cateProp"
                      @change="handleChange">
                    </el-cascader>
                  </el-form-item>
               </el-tab-pane>
                <el-tab-pane label="商品参数" name="1">
                  <!-- 渲染表单的Item页 -->
                  <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                    <!-- 复选框组 -->
                     <el-checkbox-group v-model="item.attr_vals">
                      <el-checkbox :label="param" v-for="(param,index) in item.attr_vals " :key="index" border></el-checkbox>
                    </el-checkbox-group>
                  </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品属性" name="2">
                  <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                       <el-input v-model="item.attr_vals"></el-input>
                  </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品图片" name="3">
                  <!-- action表示图片要上传到的API地址 -->
                  <el-upload
                    :action="uploadURL"
                    :on-preview="handlePreview"
                    :on-remove="handleRemove"
                    list-type="picture"
                    :headers="headerObj"
                    :on-success="handleSuccess">
                    <el-button size="small" type="primary">点击上传</el-button>
                    <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
                  </el-upload>
                </el-tab-pane>
                <el-tab-pane label="商品内容" name="4">
                   <!-- 富文本编辑器 -->
                    <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                    <el-button type="primary" class="addBtn" @click="addGoods">添加商品</el-button>
                </el-tab-pane>
               
             </el-tabs>
             </el-form>
         </el-card>
         <!-- 预览图片对话框 -->
             <el-dialog
              title="提示"
              :visible.sync="previewDialogVisible"
              width="60%">
             <img :src="previewURL"  class="previewImg" >
            </el-dialog>
  </div>
</template>

<script>
 import _ from 'lodash';
export default {
      data() {
          return {
           
            //  当前选中的tag标签值
             activeName:'0',
            //  添加商品的表单数据对象
             addForm:{
               goods_name:'',
               goods_price:0,
               goods_weight:0,
               goods_number:0,
               goods_cat:[],
               pics:[],
               goods_introduce:'',
               attrs:[],
             },
            //  商品分类数据
            cateList:[],
            // 动态参数列表
            manyTableData:[],
            // 静态属性列表
            onlyTableData:[],
            //控制预览图片对话框显示
            previewDialogVisible:false,
            //  添加商品的表单验证规则对象
            addFormRules:{
              goods_name:[{required:true,message:'请输入商品名称',trigger:'blur'}],
              goods_price:[{required:true,message:'请输入商品价格',trigger:'blur'}],
              goods_weight:[{required:true,message:'请输入商品重量',trigger:'blur'}],
              goods_number:[{required:true,message:'请输入商品数量',trigger:'blur'}],
              goods_cat:[{required:true,message:'请选择商品分类',trigger:'blur'}],

            },
            // 级联选择器的props
            cateProp:{
              label:'cat_name',
              value:'cat_id',
              children:'children',
              expandTrigger: 'hover' 
            },
            // 图片上传地址
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            //图片预览的url
            previewURL:'',
            //图片上传组件的headers请求头对象
            headerObj:{
              Authorization:window.sessionStorage.getItem('token')
            }
           
          }
      },
      computed:{
            //   进度条的值
             activeNum(){
               return parseInt(this.activeName);
             },
             cateId(){
               if(this.addForm.goods_cat.length === 3)
                return this.addForm.goods_cat[2];
               return null;
             }
      },
      created() {
         this.getCateList();
      },
      methods: {
        //点击标签的回调   
          async handleClick(){
             console.log(this.activeName);
            //  选中动态参数标签页时
             if(this.activeName==='1'){
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
                if(res.meta.status !== 200) return this.$message.error('获取动态参数失败');
                res.data.forEach(item => {
                  item.attr_vals = item.attr_vals.length === 0 ? []:item.attr_vals.split(',');
                });
                this.manyTableData = res.data;
                console.log(res.data);
             }
             else if(this.activeName==='2'){
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
                if(res.meta.status !== 200) return this.$message.error('获取静态属性失败');
               
                this.onlyTableData = res.data;
                console.log(res.data);
             }
         
           
          },
        //获取所有商品分类数据
          async getCateList(){
            const{data:res} = await this.$http.get('categories');
            if(res.meta.status !== 200) return this.$message.error('获取失败');
            console.log(res.data);
            this.cateList = res.data;
          },
        // 级联选择器选中变化回调
          handleChange(){
          
            if(this.addForm.goods_cat.length !== 3){
              this.addForm.goods_cat=[];
              return;
            }
       
            console.log(this.addForm.goods_cat);
          },
          // 离开旧标签页前的回调
          beforeTabLeave(activeName,oldActiveName){
            console.log('离开',oldActiveName);
            console.log('进入',activeName);
            if(oldActiveName==='0' && this.addForm.goods_cat.length!==3){
              this.$message.error('请先选择分类');
              return false;
            }
          },
          // 预览图片的回调
          handlePreview(file){
            console.log(file);
            this.previewURL = file.response.data.url;
            this.previewDialogVisible = true;

          },
          // 移除图片的回调
          handleRemove(file){
            // 要移除的图片的临时路径
            const filePath = file.response.data.tmp_path;
            //找到对应的索引
            const index =  this.addForm.pics.findIndex(item =>{
             item.pic === filePath});
            // 根据索引删除临时路径
            this.addForm.pics.splice(index,1);
         


          },
          // 图片上传成功的回调
          handleSuccess(response){
            console.log(response);
            const picInfo = {pic:response.data.tmp_path}
            this.addForm.pics.push(picInfo);

          },
          // 点击添加商品的功能实现
          addGoods(){
            console.log(this.addForm);
            this.$refs.addFormRef.validate(async valid=>{
              if(!valid) return;
              // goods_cat这里要转化成字符串的形式，用深拷贝来获取join方法的返回值
              const form = _.cloneDeep(this.addForm);
              form.goods_cat =this.addForm.goods_cat.join(',');
              // 处理动态参数
              this.manyTableData.forEach(item=>{
                const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals.join(',')}
                this.addForm.attrs.push(newInfo);
              })
              
              // 处理静态属性
              this.onlyTableData.forEach(item=>{
                const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals}
                this.addForm.attrs.push(newInfo);
              })
              form.attrs = this.addForm.attrs;
              console.log(form);
              const {data:res}= await this.$http.post('goods',form);
              console.log(res);
              if(res.meta.status !== 201) return this.$message.error('添加商品失败');
              this.$message.success('添加成功');
              this.$router.push('/goods');

            })
          }

      },
}
</script>

<style lang="less" >
        .el-steps--horizontal{
            margin: 15px 0;
        }
        .el-step__main .el-step__title {
            font-size: 13px;
            line-height: 38px;
        }
        .el-checkbox{
            margin-right: 5px !important;
        }
        .previewImg{
           width: 100%;
        }
        .addBtn{
          margin-top: 15px !important;
        }
    
</style>